Romania halts nuclear unit as Danube levels drop

Romania took a nuclear power unit offline on August 13, 2026 after water levels on the Danube fell, officials said, linking the decision to low river flows.

Officials did not identify the reactor or provide technical details on the shutdown. They said the unit is not expected to restart for at least 10 days, placing the earliest potential return around August 23, 2026, while cautioning the outage could last longer if river levels do not recover.

Danube water conditions drive restart uncertainty

Officials said the shutdown was tied to lower Danube levels under the plant’s operating requirements. They did not specify the thresholds involved or what additional technical checks will be required before the unit can return to service.

They said more information would be released as water conditions and technical assessments progress. Officials added that the response remains ongoing and that updates will follow as evaluations continue.

What officials said about timing

According to officials, the minimum expected outage is 10 days from August 13, 2026. They said the timeline could shift if river levels improve or deteriorate, and emphasized that an extended stoppage remains possible if Danube flows stay too low.

Grid supply to lean on domestic alternatives and imports With the nuclear unit offline, Romania’s power system will rely more heavily on other domestic generation and cross-border electricity imports during the outage, officials said. They noted the exact balance will depend on available capacity within Romania and how much electricity can be transferred through interconnectors to neighboring markets.

Energy officials described the operational impact in practical terms: removing a nuclear unit takes away steady baseload supply. They said that can increase the need for more flexible sources and raise import volumes while operators work to cover the gap.

Replacement mix depends on availability

Officials said operators typically replace the lost output using gas-fired plants, hydropower where available, and purchases from surrounding markets. They added that the mix will vary with plant availability and cross-border capacity at the time, which can change during the outage window.

Next updates tied to assessments

Officials said they will provide additional updates as hydrological conditions on the Danube evolve and technical evaluations continue. For now, they reiterated that the unit will remain offline for at least 10 days, with the duration dependent on whether river levels support a restart under operating requirements.